/// <summary>获取accessToken请求令牌</summary>
private IEnumerator GetAccessToken()
{
var uri = string.Format(ACCESS_TOKEN_API_URL + "_id={0}&client_secret={1}", apiKey, secretKey);
UnityWebRequest unityWebRequest = UnityWebRequest.Get(uri);
yield return(unityWebRequest.SendWebRequest());
if (unityWebRequest.isDone)
{
Match match = Regex.Match(unityWebRequest.downloadHandler.text, @"access_token.:.(.*?).,");
if (match.Success)
{
accessToken = match.Groups[1].ToString();
}
else
{
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_ERROR;
AsrParams asrParams = new AsrParams();
asrParams.error = 1;
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
Debug.LogWarning(GetType() + "/GetAccessToken()/验证错误,获取AccessToken失败！");
}
}
}
/// <summary>停止录音</summary>
public override void Stop()
{
if (isHaveMic == false || !Microphone.IsRecording(currentDeviceName))
{
return;
}
Microphone.End(currentDeviceName);
trueLength = Mathf.CeilToInt((float)(GetTimestampOfNowWithMillisecond() - lastPressTimestamp) / 1000f);
if (trueLength > 1)
{
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_EXIT;
AsrParams asrParams = new AsrParams();
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
StartCoroutine(StartAsr());
}
else
{
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_ERROR;
AsrParams asrParams = new AsrParams();
asrParams.error = 1;
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
Debug.LogWarning(GetType() + "/VoiceStop()/录音时长过短！");
}
}
/// <summary>取消本次识别，取消后将立即停止不会返回识别结果</summary>
public override void Cancel()
{
if (isHaveMic == false || !Microphone.IsRecording(currentDeviceName))
{
return;
}
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_CANCEL;
AsrParams asrParams = new AsrParams();
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
Microphone.End(currentDeviceName);
}
/// <summary>
/// 开始录音
/// </summary>
/// <param name="json">详情请移步 https://ai.baidu.com/ai-doc/SPEECH/9k38lxfnk </param>
public override void Begin(string json)
{
if (isHaveMic == false || Microphone.IsRecording(currentDeviceName))
{
return;
}
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_PARTIAL;
AsrParams asrParams = new AsrParams();
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
lastPressTimestamp = GetTimestampOfNowWithMillisecond();
saveAudioClip = Microphone.Start(currentDeviceName, isLoop, recordMaxLength, recordFrequency);
}
/// <summary>初始化语音</summary>
public override void Init()
{
if (isHaveMic == false || Microphone.IsRecording(currentDeviceName))
{
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_ERROR;
AsrParams asrParams = new AsrParams();
asrParams.error = 1;
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
Debug.LogWarning(GetType() + "/SpeechInit()/当前设备没有麦克风！");
}
else
{
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_READY;
AsrParams asrParams = new AsrParams();
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
}
}
/// <summary>发起语音识别请求</summary>
private IEnumerator StartAsr()
{
if (string.IsNullOrEmpty(accessToken))
{
yield return(GetAccessToken());
}
string asrResult = string.Empty;
//处理当前录音数据为PCM16
float[] samples = new float[recordFrequency * trueLength * saveAudioClip.channels];
saveAudioClip.GetData(samples, 0);
var samplesShort = new short[samples.Length];
for (var index = 0; index < samples.Length; index++)
{
samplesShort[index] = (short)(samples[index] * short.MaxValue);
}
byte[] datas = new byte[samplesShort.Length * 2];
Buffer.BlockCopy(samplesShort, 0, datas, 0, datas.Length);
string url = string.Format("{0}?cuid={1}&token={2}", "https://vop.baidu.com/server_api", SystemInfo.deviceUniqueIdentifier, accessToken);
WWWForm wwwForm = new WWWForm();
wwwForm.AddBinaryData("audio", datas);
UnityWebRequest unityWebRequest = UnityWebRequest.Post(url, wwwForm);
unityWebRequest.SetRequestHeader("Content-Type", "audio/pcm;rate=" + recordFrequency);
yield return(unityWebRequest.SendWebRequest());
if (string.IsNullOrEmpty(unityWebRequest.error))
{
asrResult = unityWebRequest.downloadHandler.text;
Debug.Log(asrResult);
SpeechEventListenerInfo callbackMessage = new SpeechEventListenerInfo();
AsrParams asrParams = new AsrParams();
WebAsrParams webAsrParams = JsonUtility.FromJson <WebAsrParams>(asrResult);
OriginResult originResult = new OriginResult();
originResult.err_no = webAsrParams.err_no;
originResult.err_msg = webAsrParams.err_msg;
originResult.corpus_no = webAsrParams.corpus_no;
originResult.sn = webAsrParams.sn;
originResult.result.word = webAsrParams.result;
asrParams.origin_result = originResult;
asrParams.results_recognition = webAsrParams.result;
callbackMessage.state = SpeechConstant.CALLBACK_EVENT_ASR_PARTIAL;
callbackMessage.param = JsonUtility.ToJson(asrParams);
OnWebSpeechCallback(callbackMessage);
}
else
{
Debug.LogWarning(GetType() + "/StartAsr()/语音识别识别！");
}
}
public static AsrParams GetAsrParams(string data)
{
AsrParams asrParams = JsonUtility.FromJson <AsrParams>(data);
return(asrParams);
}